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Specifications of measuring equipment
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O.1

Scope and application of measurement equipment specifications covered in the O-series Recommendations  

O.3

Climatic conditions and relevant tests for measuring equipment  

O.6

1020 Hz reference test frequency  

O.9

Measuring arrangements to assess the degree of unbalance about earth  

O.11

Maintenance access lines  

O.22

CCITT automatic transmission measuring and signalling testing equipment ATME No. 2  

O.25

[Withdrawn] Semiautomatic in-circuit echo suppressor testing system (ESTS)  
Deleted after its content became technically out of date

O.27

In-station echo canceller test equipment  

O.31

[Withdrawn] Automatic measuring equipment for sound-programme circuits  
Deleted after its content became technically out of date

O.32

[Withdrawn] Automatic measuring equipment for stereophonic pairs of sound-programme circuits  
Deleted after its content became technically out of date

O.33

Automatic equipment for rapidly measuring stereophonic pairs and monophonic sound-programme circuits, links and connections  

O.41

Psophometer for use on telephone-type circuits  
This Recommendation is also included but not published in P series under alias number P.53

O.42

Equipment to measure non-linear distortion using the 4-tone intermodulation method  

O.51

[Withdrawn] Volume meters  
O.51 was an alias name of ITU-T P.52. Only this alias name was suppressed. ITU-T P.52 remains valid

O.61

Simple equipment to measure interruptions on telephone-type circuits  

O.62

Sophisticated equipment to measure interruptions on telephone-type circuits  

O.71

Impulsive noise measuring equipment for telephone-type circuits  
This Recommendation is also included but not published in V series under alias number V.55

O.72

[Withdrawn] Characteristics of an impulsive-noise measuring instrument for wideband data transmission  
ITU-T O.72 was withdrawn on 1998-06-18.

O.81

Group-delay measuring equipment for telephone-type circuits  

O.82

Group-delay measuring equipment for the range 5 to 600 kHz  

O.91

Phase jitter measuring equipment for telephone-type circuits  

O.95

Phase and amplitude hit counters for telephone-type circuits  

O.111

Frequency shift measuring equipment for use on carrier channels  

O.131

Quantizing distortion measuring equipment using a pseudo-random noise test signal  

O.132

Quantizing distortion measuring equipment using a sinusoidal test signal  

O.133

Equipment for measuring the performance of PCM encoders and decoders  

O.150

General requirements for instrumentation for performance measurements on digital transmission equipment  

O.151

Error performance measuring equipment operating at the primary rate and above  

O.152

Error performance measuring equipment for bit rates of 64 kbit/s and N x 64 kbit/s  

O.153

Basic parameters for the measurement of error performance at bit rates below the primary rate  

O.161

In-service code violation monitors for digital systems  

O.162

Equipment to perform in-service monitoring on 2048, 8448, 34 368 and 139 264 kbit/s signals  

O.163

Equipment to perform in-service monitoring on 1544 kbit/s signals  

O.171

Timing jitter and wander measuring equipment for digital systems which are based on the plesiochronous digital hierarchy (PDH)  

O.172

Jitter and wander measuring equipment for digital systems which are based on the synchronous digital hierarchy (SDH)  

O.173

Jitter measuring equipment for digital systems which are based on the optical transport network  

O.174

Jitter and wander measuring equipment for digital systems which are based on synchronous Ethernet technology  

O.175

Jitter measuring equipment for digital systems based on XG-PON  

O.181

Equipment to assess error performance on STM-N interfaces  

O.182

Equipment to assess error performance on Optical Transport Network interfaces  

O.191

Equipment to measure the cell transfer performance of ATM connections  

O.201

Q-factor test equipment to estimate the transmission performance of optical channels  

O.211

Test and measurement equipment to perform tests at the IP layer  

O.220

Framework for end-to-end QoS measurement and supervision for leased-circuit services  

O.Sup3.1

[Withdrawn] Measuring instrument requirements - Sinusoidal signal generators and level-measuring instruments  
This Supplement was withdrawn because its content was out of date

O.Sup3.2

[Withdrawn] Noise measuring instruments for telecommunication circuits  
This Supplement was withdrawn because its content was out of date

O.Sup3.3

[Withdrawn] Principal characteristics of volume indicators  
This Supplement was withdrawn because its content was out of date

O.Sup3.4

[Withdrawn] Consideration of interworking between different designs of apparatus for measuring quantizing distortion  
This Supplement was withdrawn because its content was out of date

O.Sup3.6

[Withdrawn] Crosstalk test device for carrier-transmission on coaxial systems  
This Supplement was attached to ITU-T Rec. O.1 (05/96) as Appendix I without further modification

O.Sup3.7

[Withdrawn] A measuring signal (multitone test signal) for fast measurement of amplitude and phase for telephone type circuits  
This Supplement was renumbered as ITU-T Rec. O.81 Appendix I (06/98) without further modification

O.Sup3.8

[Withdrawn] Guidelines concerning the measurement of jitter  
This Supplement was attached to ITU-T Rec. O.171 (04/97) as Appendix I without further modification

 

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Updated : 2014-05-15